:root{color-scheme:dark;--base:#101a17;--panel:#192820;--line:#3a5140;--ink:#e8ebe1;--muted:#b0beae;--accent:#d9ba75;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--base);color:var(--ink)}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{background:#263b30;border:1px solid #526b54;color:#eee8d7;border-radius:7px;padding:9px 11px;cursor:pointer}button:disabled{opacity:.36;cursor:default}button[aria-pressed="true"],.phases button.active{background:#745d39;color:#fff6e4;border-color:#bd9e69}.topbar{border-bottom:1px solid var(--line);padding:16px 25px;display:flex;gap:16px;align-items:center;justify-content:space-between;font-size:.82rem}.brand{letter-spacing:.21em;font-weight:800}.brand span{color:var(--accent)}.brand small{font-size:.65rem;font-weight:500;color:var(--muted);letter-spacing:.11em;margin-left:9px}main{max-width:1460px;margin:auto;padding:27px}.intro{max-width:920px;margin-bottom:25px}.intro h1{font:normal clamp(2rem,4.6vw,3.65rem)/1.06 Georgia,serif;margin:.16em 0}.intro p{max-width:810px;color:var(--muted);line-height:1.6}.eyebrow{color:#a9c2a2;letter-spacing:.16em;font-size:.73rem;text-transform:uppercase}.workspace{display:grid;grid-template-columns:minmax(0,1.75fr) minmax(275px,.8fr);gap:17px}.viewport-pane,.panel{border:1px solid var(--line);background:var(--panel);border-radius:11px;overflow:hidden}.pane-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 18px;border-bottom:1px solid var(--line);font-size:.76rem;letter-spacing:.06em;color:#d0dbc8}.pane-header strong{color:var(--accent);font-weight:600;text-align:right;letter-spacing:0}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;flex-wrap:wrap}.toolbar span,.hint{color:#aebead;font-size:.77rem;line-height:1.5}.toolbar .group{display:flex;gap:6px;flex-wrap:wrap}.toolbar button{font-size:.78rem;padding:7px 10px}.canvas-shell{position:relative;padding:0 9px}.canvas-shell canvas{width:100%;height:min(60vh,550px);min-height:345px;display:block;background:#11201c;border-radius:7px;touch-action:none;cursor:grab}.canvas-shell canvas:active{cursor:grabbing}.canvas-badge{position:absolute;top:13px;left:22px;background:#1f342bdc;border:1px solid #486958;padding:6px 10px;border-radius:5px;font-size:.69rem;text-transform:uppercase;letter-spacing:.1em}.axis-legend{position:absolute;right:23px;bottom:12px;font-size:.67rem;color:#b7c7bd;background:#10201bcf;border-radius:4px;padding:4px 7px}.legend{padding:13px 16px;display:flex;flex-wrap:wrap;gap:12px;font-size:.73rem;color:#cbd4c4}.legend span{display:inline-flex;gap:6px;align-items:center}.legend i{width:13px;height:13px;border-radius:3px;border:1px solid #b7b8a8}.legend .top{background:#647c5b}.legend .sub{background:#ae875d}.legend .fill{background:#d0ae76}.legend .rock{background:#777b80}.legend .assume{background:transparent;border:2px dashed #f1c781}.stage-controls{padding:15px;border-top:1px solid var(--line)}.stage-navigation{display:flex;align-items:center;gap:13px}.stage-navigation label{flex:1;font-size:.71rem;letter-spacing:.09em;color:#ced6c8;display:grid;gap:8px}.stage-navigation output{float:right}.stage-navigation input{width:100%;accent-color:var(--accent)}.stage-navigation button{font-size:.77rem}.phases{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.phases button{font-size:.73rem;padding:6px 9px}aside{display:flex;flex-direction:column;gap:13px}.panel{padding:17px}.panel h2{font:normal 1.34rem/1.2 Georgia,serif;margin:9px 0}.panel h3{font-size:.91rem;margin:13px 0 5px}.panel p{font-size:.82rem;line-height:1.5;color:#c6d0c2}.panel dl{margin:12px 0 6px}.panel dl div{display:flex;justify-content:space-between;align-items:baseline;padding:9px 0;border-bottom:1px solid #3a5140;font-size:.81rem}.panel dt{color:#bac9b7}.panel dd{margin:0;font-variant-numeric:tabular-nums;color:#f0dfbd;font-weight:650}.toggle-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:14px 0}.toggle-grid label{font-size:.8rem;display:flex;gap:6px;align-items:center}.toggle-grid input{accent-color:#e4bc77}.slice-controls{border-top:1px solid var(--line);padding-top:12px;display:grid;gap:7px;font-size:.76rem}.slice-controls select{background:#20352b;color:#e4e8de;padding:7px;border:1px solid #4b6c54;border-radius:5px}.slice-controls input{accent-color:var(--accent);width:100%}.slice-controls output{float:right}.truth{display:inline-block;background:#304c3c;color:#d3e0c3;padding:6px 8px;border-radius:5px;font-size:.72rem}.warning{border-color:#877044;background:#2d2d24}.warning strong{font-size:.76rem;letter-spacing:.09em;color:#f0c891}footer{padding:20px;text-align:center;color:#8c9e91;font-size:.76rem}@media(max-width:940px){.workspace{grid-template-columns:1fr}.canvas-shell canvas{height:470px}.intro{margin-bottom:14px}}@media(max-width:520px){main{padding:13px}.topbar{padding:12px}.brand small{display:none}.topbar>a{font-size:.7rem}.canvas-shell canvas{min-height:300px;height:390px}.stage-navigation{gap:6px}.stage-navigation button{padding:7px;font-size:.72rem}.pane-header{flex-direction:column;align-items:flex-start}.panel{padding:13px}}

/* EW-VIS3a native constructed stone, never a proposed or generated footing. */
.legend .stone{background:#bab6ab;border-color:#e3d9c7}
.foundation-stats{display:grid;grid-template-columns:1fr auto;gap:9px 13px;padding:13px 0;border-top:1px solid #45634f;margin-top:10px;font-size:.8rem}.foundation-stats strong{font-weight:500;color:#c2cbb9}.foundation-stats span{color:#f0d7a8;text-align:right;font-variant-numeric:tabular-nums}